As far as the editing goes, it is seamless here. I didn't notice anything jarring or strange.
As for the movie. This edit drastically improves Spider-Man 3 for me. If I watch it in the future, I will be watching this version. The characters and their motivations are all strengthened here. The more cringey elements are gone. Sandman's absurd connection to Peter is completely removed. The only thing no edit can fix unfortunately is the fact that Venom is included in this movie. It should've been just Sandman and the black suit. Sandman's character should've been bolstered a little more (without shoehorning it into Peter's origin story). But again, this edit can only work with what's available.
Despite the things I wish weren't in this movie even after so much is stripped away, this edit does increase my rating by a lot. The original I would give a 6/10. There are definitely good things in there, and the first 45 minutes are just as good as the movies that came before (and that beginning largely remains intact in this edit). But this edit I would give a solid 8/10. I actually enjoyed watching this one and didn't feel disappointed by the end.
Thank you for this edit, Badscooter. It's a huge improvement over the original version.
I recommend this edit to anyone who enjoyed certain elements of Spider-Man 3, but was turned off by its overall goofiness and lame subplots. I love that Sandman doesn't have a personal connection to Peter anymore (the scene where black-suit Spider-Man angrily goes after Sandman and 'kills' him, now comes across as a jealous and ego-inflated Spider-Man going after the guy who beat him in an earlier fight, rather than going after the man who killed his uncle. This actually makes Peter's descent with the symbiote seem much much darker).
I also like that some of Gwen Stacy's stuff was cut out. Her character wasn't done well in this series.
With this edit, I found myself sympathizing with Harry and MJ A LOT more.
And of course, the greatest thing about this edit is that there's no ridiculous montage of Peter being 'bad'.
I thought all the editing was great, and I like the image of MJ that flashed as Peter was in bed and about to be taken by the symbiote. I would have removed the images of Ben Parker though since they seemed to come out of nowhere.
I like the small edits here and there of removing silly one-liner humour...it helped keep me engaged in the drama and action.
And the only thing in this edit that still significantly bothered me was how Peter sort of danced along with the marching band at the ceremony to give Spider-Man the key to the city.
Overall, a great edit that turned an unwatchable movie into a very watchable one.